JP Instruments Fuel Flow Transducer

• Range (201) 0.6 to 60 GPH, (231) 3 to 90 GPH, (H) 3 to 120 GPH
• K-factor (201) ~ 29.00, (231) ~19.50, (H) ~48.00
• Linearity 1%
• Pressure drop (201) 1.2 psi at 30 GPH, 4.8 psi at 60 GPH
• Pressure drop (231) 0.31 psi at 30 GPH, 2.8 psi at 60 GPH
• Pressure drop (H) 0.23 psi at 30 GPH, 0.8 psi at 60 GPH
• Working pressure (201, 231) 200 psi, (H) 1500 psi
• Maximum burst pressure 2000 psi
• Temperature range, operating -55°C to 70°C
• Temperature range, non-operating (201, 231) -65°C to 125°C, (H) -65°C to 100°C
• Fuel ports (201, 231) 1/4 Female NPT (H) AN816-8-8

Install Overview:

1. Make sure the transducer is Horizontal with the three wires up. Failure to do this will result in premature failure. Please refer to Report #503 that came with your EDM with Fuel Flow.
2. Mount in a horizontal position with the wires up, as this ensures that the rotor is in proper orientation to the flow of fuel just as it was calibrated.
3. Be sure there is no bend in the line closer than 6 inches before or after the transducer. Do not use aluminum fittings when installing the fuel flow transducer.
4. For carbureted engines, before the carburetor. If the transducer is higher than the carburetor, put an anti-siphon loop in the line that peaks higher than the transducer (see installation manual, but the diagram shows the transducer on its side, rather than the correct position which is with the wires coming off the top).
5. For injected engines, between the engine fuel pump and the servo regulator. For injected engines with vapor return lines (rare), between the servo regulator and the flow divider (spider).
6. Mounting the transducer between the electric boost pump and the mechanical pump is not recommended.
7. Do not hard mount the transducer to the engine. Vibration may damage the internal parts of the transducer or cause erratic readings.
8. Tighten fittings not more than 15 ft lb = 180 in lbs., or two full turns past hand tight.

** Do not use Teflon tape or thread sealant compound of any kind – this will void transducer warranty.** [See “Report #503 Rev B: Date 03/14/97 under heading #2 “Initial Check Out” – line item #14.]